Removal of the Power Plant with the Engine Positioner TWW 75E (MIAG) [CFMB]

TASK 71-00-00-000-042-A-01
Removal of the Power Plant with the Engine Positioner TWW 75E (MIAG)

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
This task gives the information for the removal of the power plant.
The power plant can be removed in particular configuration. It is permitted to remove the power plant with or without the air intake cowl installed.

NOTE: Interferences between the LPTACC inlet airscoop assembly and the thrust reverser cowl have been observed in production on a limited number of A320 Family aircraft powered with CFM56-5B/3 engines. CFM has issued SB CFM56-5B S/B 75-0044. In order to recover the gap between the LPTACC scoop and the thrust reverser cowl to avoid potential interference, Airbus recommends to incorporate this SB at the opportunity of engine removal/installation.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	PLIERS - NOSE, SOFT, LONG
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	TAPE - ADHESIVE
No specific	AR	TIE WRAP(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )
No specific	Torque wrench: range to between 18 and 12 m.daN (132.74 and 88.50 lbf.ft )
98D27803500001	1	LOCKING TOOL ZERO POS
RSE1224	2	SPLINT-ENGINE MOUNT AFT
S587-2BH0	1	BRACE - HOLD OPEN COWLS
TMHBS10-10-00	1	BRACE-HOLD OPEN COWLS
TWW75E	1	ENGINE POSITIONER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil
(Material No.CP8001)	safetywire 0.032 in. (0.8 mm) dia.
(Material No.CP8002)	safetywire 0.032 in. (0.8 mm) dia.

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR, 473AL, 473AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR, 483AL, 483AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
90	PACKING	AIPC 73-11-10-01-290

E. Referenced Information

REFERENCE	DESIGNATION
TASK 05-57-00-200-001-A	Aircraft Stability
TASK 05-57-00-200-001-B	Aircraft Stability
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 27-80-00-866-005-A	Retracting the Slats on the Ground
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 31-36-00-740-015-A	Printout of the Engine/APU Hours and Cycles Stored in the Flight Data Interface and Management Unit (FDIMU)
TASK 36-11-49-000-026-A	Removal of the Sense Line between the Bleed Pressure-Regulator Valve (PRV) and the Pylon Interface
TASK 70-22-00-911-002-A	Locking Procedures
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
Fan Duct Panels and Sealing Fitting Assy
Hold Open Cowl Braces - Installation
Fuel Filter Drain Plug
Thrust Reverser Electrical Connectors
Power Plant - Right Side
Power Plant - Left Side
Pneumatic System
Forward Engine Mount
Aft Engine Mount

3. Job Set-up
Subtask 71-00-00-740-054-A ** ON A/C NOT FOR ALL

A. Do a printout of the engine hours and cycles and keep the print with the engine for follow-up (Ref. AMM TASK 31-36-00-740-006) or (Ref. AMM TASK 31-36-00-740-015).

NOTE: Some tasks will possibly not be applicable depending on whether a DMU or an FDIMU is installed on the aircraft.

Subtask 71-00-00-941-104-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that aircraft is stable (Ref. AMM TASK 05-57-00-200-001).

NOTE: If the aircraft is on jacks, make sure that it is leveled before you remove the engine.

(2) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(3) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(4) On overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
(5) Make sure that the slats are retracted (Ref. AMM TASK 27-80-00-866-005) and install 98D27803500001 LOCKING TOOL ZERO POS on the flap and slat control lever.
(6) On panel 30VU, make sure that the APU BLEED pushbutton switch is released (ON legend off) and install a WARNING NOTICE(S) to tell persons not to use it.
(7) Put a WARNING NOTICE(S) on the HP ground connector to tell persons not to pressurize the pneumatic system.

Subtask 71-00-00-861-090-A ** ON A/C NOT FOR ALL

C. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 71-00-00-865-118-A ** ON A/C NOT FOR ALL

WARNING: OPEN THE PROBE HEATER CIRCUIT-BREAKERS 1DA1(2), 3DA1(2,3), 4DA1(2,3) AND 5DA1(2,3) BEFORE ENG1(2)FADEC A and EIU 1(2) C/B'S 2KS1 AND 2KS2. IF YOU DO NOT OBEY THIS SEQUENCE:

THE PROBES WILL BECOME TOO HOT.
THIS CAN CAUSE DAMAGE TO EQUIPMENT AND INJURY TO MAINTENANCE PERSONNEL.

D. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/CVR/SPLY	2RK	E14
49VU	COM/CVR/CTL	4RK	E13
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
49VU	ANTI ICE/PROBES/AOA/1	4DA1	D04
49VU	ANTI ICE/PROBES/PITOT/1	3DA1	D02
** ON A/C NOT FOR ALL
49VU	ANTI ICE/RAIN/RPLNT/CAPT	1DB1	D01
** ON A/C NOT FOR ALL
49VU	COM/CVR/SPLY	23RK	E14
49VU	COM/CVR/CTL	26RK	E13
** ON A/C NOT FOR ALL
121VU	RCDR/DFDR	7TU	K16
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE2	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41
122VU	ANTI ICE/WINDOWS/R	4DG2	W14
122VU	ANTI ICE/WINDOWS/L	4DG1	X14
122VU	ANTI ICE/PROBES/2/TAT	1DA2	Y15
122VU	ANTI ICE/PROBES/2/PITOT	3DA2	Y14
122VU	ANTI ICE/PROBES/2/AOA	4DA2	Y13
122VU	ANTI ICE/PROBES/2/STATIC	5DA2	Y11
122VU	ANTI ICE/PROBES/3/PITOT	3DA3	Z16
122VU	ANTI ICE/PROBES/3/AOA	4DA3	Z15
122VU	ANTI ICE/PROBES/3/STATIC	5DA3	Z14
122VU	ANTI ICE/PROBES/1/STATIC	5DA1	Z13
122VU	ANTI ICE/PROBES/1/TAT	1DA1	Z12
** ON A/C NOT FOR ALL
122VU	ANTI ICE/RAIN/RPLNT/F/O	1DB2	W11
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
49VU	ENGINE/1/FIRE DET/LOOP A	7WD1	A06
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
122VU	ELEC/GCU/1	2XU1	T26
122VU	ANTI ICE/ENG/1	1DN1	X10
FOR FIN: 1000EM2 (ENGINE2)
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
49VU	ENGINE/2/FIRE DET/LOOP B	8WD2	A07
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/ENG2/FADEC B	4KS2	Q40
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39
122VU	ELEC/GCU/2	2XU2	T27
122VU	ANTI ICE/ENG/2	1DN2	W10
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 71-00-00-865-157-A ** ON A/C NOT FOR ALL

WARNING: OPEN THE PROBE HEATER AND WINDOW HEATER CIRCUIT-BREAKERS BEFORE YOU OPEN THE PHC AND WHC CIRCUIT BREAKERS. IF YOU DO NOT OBEY THIS SEQUENCE:

THE PROBES WILL BECOME TOO HOT.
THIS CAN CAUSE DAMAGE TO EQUIPMENT AND INJURY TO MAINTENANCE PERSONNEL.

E. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ANTI ICE/PROBES/PHC/1	2DA1	D03
122VU	ANTI ICE/WHC/2	5DG2	W13
122VU	ANTI ICE/WHC/1	5DG1	X13
122VU	ANTI ICE/PROBES/PHC/3	2DA3	Y16
122VU	ANTI ICE/PROBES/PHC/2	2DA2	Y12

Subtask 71-00-00-865-119-A ** ON A/C NOT FOR ALL

F. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	ENGINE/1/HP FUEL SOV	1KC1	A01
FOR FIN: 1000EM2 (ENGINE2)
49VU	ENGINE/2/HP FUEL SOV	1KC2	A02

Subtask 71-00-00-941-105-A ** ON A/C NOT FOR ALL

G. Put a WARNING NOTICE(S) on the circuit breaker(s) 1KC1(2) to tell persons not to open it (them).

Subtask 71-00-00-864-052-A ** ON A/C NOT FOR ALL

H. Depressurize the hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001):
(1) FOR [1000EM1] (ENGINE-1)
Depressurize the Green hydraulic reservoir.
(a) FOR [1000EM2] (ENGINE-2)
Depressurize the Yellow hydraulic reservoir.

Subtask 71-00-00-010-129-A ** ON A/C NOT FOR ALL

I. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 71-00-00-040-080-A ** ON A/C NOT FOR ALL

J. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 71-00-00-010-130-A ** ON A/C NOT FOR ALL

K. Get Access

CAUTION: BEFORE OPENING THE THRUST REVERSER DOORS TO THE 45 DEGREES POSITION MAKE SURE THAT THE SLATS ARE RETRACTED. IF NOT THE SLATS CAN TOUCH THE INBOARD THRUST REVERSER DOOR.

(1) Open the thrust reverser doors to the 45 degrees position (Ref. AMM TASK 78-36-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(3) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 71-00-00-941-106-A ** ON A/C NOT FOR ALL

L. Put the ACCESS PLATFORM 1M(3 FT) in position at the engine level.
(1) At the half upper part of the fan frame, seal the fan duct panels with TAPE - ADHESIVE.

Fan Duct Panels and Sealing Fitting Assy ** ON A/C NOT FOR ALL

Subtask 71-00-00-480-066-A ** ON A/C NOT FOR ALL

M. Retract Fan and Thrust Hold Open Rods
(1) Install S587-2BH0 BRACE - HOLD OPEN COWLS or TMHBS10-10-00 BRACE-HOLD OPEN COWLS to support the fan and thrust reverser cowl doors.

Hold Open Cowl Braces - Installation ** ON A/C NOT FOR ALL

(2) Retract the fan cowl hold open rods (Ref. AMM TASK 71-13-00-410-040).
(3) Retract the thrust reverser doors hold open rods (Ref. AMM TASK 78-36-00-410-040).

Subtask 71-00-00-480-066-B ** ON A/C NOT FOR ALL

M. Retract Fan and Thrust Hold Open Rods
(1) Install S587-2BH0 BRACE - HOLD OPEN COWLS or TMHBS10-10-00 BRACE-HOLD OPEN COWLS to support the fan and thrust reverser cowl doors.

Hold Open Cowl Braces - Installation ** ON A/C NOT FOR ALL

(2) Retract the fan cowl hold open rods (Ref. AMM TASK 71-13-00-410-040).
(3) Retract the thrust reverser doors hold open rods (Ref. AMM TASK 78-36-00-410-040).

Subtask 71-00-00-680-055-A ** ON A/C NOT FOR ALL

N. Drain the remaining fuel from the engine and the pylon fuel hose at the fuel filter as follows:

Fuel Filter Drain Plug ** ON A/C NOT FOR ALL

(1) Put a CONTAINER 5 L (1.32 USGAL) under the engine for draining residual fuel.
(2) Cut and remove the safetywire from the drain plug (80) of the fuel filter cover.
(3) Remove the drain plug (80) from the fuel filter cover and let the fuel drain from the fuel filter cover.
(4) Remove and discard the packing (90) from the drain plug (80).

WARNING: USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.

(5) Lubricate a new AIPC 73-11-10-01-290 PACKING (90) with engine oil (Material No.CP2442) .
(6) Install the packing (90) on the drain plug (80).
(7) Install the drain plug (80) and TORQUE to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )

. Safety with CP8001safetywire 0.032 in. (0.8 mm) dia. or CP8002safetywire 0.032 in. (0.8 mm) dia. (Ref. AMM TASK 70-22-00-911-002).

Subtask 71-00-00-010-131-B ** ON A/C NOT FOR ALL

O. Remove the components:
(1) At the rear of the drain mast, remove the drain tube.
(2) Remove the access panels:
(a) FOR [1000EM1] (ENGINE-1)
473AL 473AR
(b) FOR [1000EM2] (ENGINE-2)
483AL 483AR.
(3) Remove these components from the right side of the engine:
(a) Disconnect the electrical connectors 450VCA, 452VCA, 454VCA and 457VCA from the aft pylon junction box.

Thrust Reverser Electrical Connectors ** ON A/C NOT FOR ALL

NOTE: If necessary, use the PLIERS - NOSE, SOFT, LONG to loosen the electrical connectors.

(b) Remove the two clamps which attach the core harness to the pylon and keep them attached to the harness.

NOTE: Two clamp sizes can be found depending on the core harness diameter. To make sure that the correct clamps are installed, keep the clamps attached to the harness.

Power Plant - Right Side ** ON A/C NOT FOR ALL

(d) Disconnect the thrust reverser harness connectors 4101KSB, 4101KSA and 4102KSA from the thrust reverser hydraulic control unit.

Power Plant - Right Side ** ON A/C NOT FOR ALL

(e) Remove the screw (15) and nut (20) that attach the clamps (10), (25) to the bracket on the HCU.
(f) Remove the clamp (10) from the harness for connector 4101KSB and remove the harness from the HCU.

NOTE: Loosely install the screw (15) and nut (20) on the clamp (25) and tighten with your hand.

(g) Disconnect the electrical connectors 401VCA, 402VCA, 403VCA, 404VCA, 405VCA, 406VCA, 407VCA, 408VCA, 409VCA, 447VCA and 448VCA from the forward pylon junction box.

Power Plant - Right Side ** ON A/C NOT FOR ALL

(h) Remove the coupling (5) and disconnect the upper starter duct from the pylon duct.

Power Plant - Right Side ** ON A/C NOT FOR ALL

(i) Install COVER - PROTECTION on the open ends of the ducts. the HCU.
(j) Install PLUG - BLANKING on the electrical connectors.
(4) Remove these components from the left side of the engine:
(a) Disconnect the thrust reverser harness connectors 4100KSA and 4100KSB from the electrical junction box.
(b) Disconnect the coupling half on the suction hose (60), the pressure hose (55), and the upper case drain hose (50) from the fluid disconnect panel.

Power Plant - Left Side ** ON A/C NOT FOR ALL

(d) Remove the bolts (35), the washers (40) that attach the fuel/return by-pass hose (45), from the fluid disconnect panel. Remove and discard the gasket (10).

Power Plant - Left Side ** ON A/C NOT FOR ALL

(e) Remove the bolts (25), the washers (30) that attach the main fuel supply hose (20) to the fluid disconnect panel. Remove and discard the gasket (15).

Power Plant - Left Side ** ON A/C NOT FOR ALL

(f) Install COVER - PROTECTION on the disconnected hoses and tubes.
(g) Disconnection of the tubes:

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

1 Disconnect the sense tubes (75) and (80) from the pylon interface tubes.

Pneumatic System ** ON A/C NOT FOR ALL

2 Disconnect the pressure tube (70) from the union installed in the upper high-pressure manifold duct (engine 1 only).

Pneumatic System ** ON A/C NOT FOR ALL

3 Remove the coupling (65) and disconnect the pylon interface duct from the pylon duct.

Pneumatic System ** ON A/C NOT FOR ALL

Subtask 71-00-00-020-079-A ** ON A/C NOT FOR ALL

P. Removal of the Pressure Regulator Valve (PRV) Sense Line
(1) Remove the sense line between the bleed PRV and the pylon interface (Ref. AMM TASK 36-11-49-000-026).

Subtask 71-00-00-020-069-A ** ON A/C NOT FOR ALL

Q. Loosen the forward engine mount bolts.
(1) Remove the bolts (100), the washers (105) and (115), and nuts (110) that attach the nut retainers (125).

Forward Engine Mount ** ON A/C NOT FOR ALL

(2) Cut and remove the safetywire and loosen the bolts (85) as follows:
(a) Loosen one bolt. TORQUE again the bolt to between 18 and 12 m.daN (132.74 and 88.50 lbf.ft )

or to the maximum load that a mechanic can apply with a standard wrench.
(b) Apply this procedure on the three remaining bolts, one by one.

Subtask 71-00-00-480-067-A ** ON A/C NOT FOR ALL

R. Installation of the Engine Positioner TWW 75E.

CAUTION: MAKE SURE THAT THE ENGINE POSITIONER IS ON A FLAT, CONCRETE SURFACE. IF THERE IS A SLOPE, IT MUST NOT BE MORE THAN 2 DEG.

(1) Make sure that the TWW75E ENGINE POSITIONER is operational.
(2) Install the engine cradle onto the rail system of the engine positioner.
(3) On the control panel of the positioner, push the button SET REFERENCE VALUE to set the load value to zero.
(4) Install the engine positioner under the engine.

CAUTION: DO NOT CAUSE DAMAGE TO THE ENGINE WHILE YOU LIFT THE CRADLE.

CAUTION: BE CAREFUL WHEN YOU INSTALL THE CRADLE ON, OR REMOVE IT FROM, THE ENGINE. IF NOT, YOU CAN CAUSE DAMAGE TO THE VIBRATION SENSOR CONNECTOR. THE VIBRATION SENSOR CONNECTOR IS IN FRONT OF THE FORWARD HANDLING POINT ON THE RIGHT SIDE.

(a) Start up the engine positioner.
(b) Position the engine positioner with the cradle on it, below the engine. Use the right joystick to move the positioner.
(c) Lift and adjust the engine positioner with the cradle assembly. Lightly move the positioner to adjust it. Use the left joystick to lift the positioner.
(d) Insert the pins of the front fixtures of the engine handling points and then install the rear support on the left side. Attach to the engine with a ball pin.
(e) Continue to lift the engine positioner until the tool takes over the weight of the engine from the wing.

NOTE: From this point, the load taken over by the four pillars of the positionner must be monitored all the time on the control panel.

(f) Continue to lift and make sure that display on the control panel shows the load taken over by the four pillars of the positioner. When the load is between zero and 300 daN (overload), the load bar is green. When the load is more than 300 daN, the load bar becomes red and the lifting system of the engine positioner stops (overload protection).
(g) Lift the front and aft pillars together or only the front pillars or the aft pillars to obtain the front and aft preloads.
(h) When a lift pillar is at 100 percent of preload, the related load bar becomes red and the movement stops.
(i) On the control panel of the positioner, release this overload:
1 Push the RELEASE key.
(j) Lower the pillar which is overload.
(k) Lift the other pillars until all pillars are near to 300 daN (overload).
(l) Use the left joystick until all load values become stable and the up movement stops.

4. Procedure
Subtask 71-00-00-020-070-A ** ON A/C NOT FOR ALL

A. Remove the bolts of the engine mounts

WARNING: BEFORE YOU REMOVE OR INSTALL THE POWER PLANT, MAKE SURE THAT ALL PERSONNEL IS AWAY FROM THE AIRCRAFT. THE POWER PLANT WEIGHS APPROXIMATELY 6280 POUNDS (2850 KG). IF IT FALLS ON PERSONS, INJURY OR DEATH CAN OCCUR.

(1) Remove the bolts (85), washers (90), nuts (120) that attach the forward engine mount (95) to the pylon.

Forward Engine Mount ** ON A/C NOT FOR ALL

(2) Remove the bolts (135) and washers (140) that attach the aft engine mount (145) to the pylon.

Aft Engine Mount ** ON A/C NOT FOR ALL

Subtask 71-00-00-869-274-A ** ON A/C NOT FOR ALL

B. Make sure that no lines or unions stay connected to the pylon.

Subtask 71-00-00-480-068-A ** ON A/C NOT FOR ALL

C. Removal of the Engine from the Aircraft
(1) Use the left joystick to lower the engine.
(2) Have an engine trolley available with the 90 inch rail system.
(3) Move the engine positioner away from the wing and assemble the rail system of the engine positioner with the rail system of the engine trolley.
(4) Move the cradle from the positioner to the engine trolley.

Subtask 71-00-00-020-071-A ** ON A/C NOT FOR ALL

D. Remove the engine.

Subtask 71-00-00-480-083-A ** ON A/C NOT FOR ALL

E. Installation of the Aft Engine Mount Anti Gouge Splints
(1) Put the top splint assemblies (larger) on the outside of the aft engine mount links.

NOTE: The end of the splint assembly marked TOP must touch the beam assembly. The other end marked BOTTOM must touch the links.

(2) Put the bottom splint (smaller) on the inside of the aft engine mount links.
(3) Attach the RSE1224 SPLINT-ENGINE MOUNT AFT to the engine mount two places with TIE WRAP(S).
(a) Wind the TIE WRAP(S) around the splints and the aft mount where the splint touches the beam assembly.
(b) Wind the TIE WRAP(S) around the splints and the aft mount where the splint touches the link.
(c) Make sure that the TIE WRAP(S) is wound very tight and that the splints can not move.

[Rev.10 from 2021] 2026.04.01 02:24:25 UTC